C# Regular Expression excluding a string

Question

I got a collection of string and all i want for regex is to collect all started with http..

href=\"http://www.test.com/cat/1-one_piece_episodes/\"href

Answer 1

@ridgerunner and me would change the regex to:

href="((?:(?!\bexclude\b)[^"])*)[^#]"

It matches all href attributes as long as they don't end in # and don't contain the word exclude.

Explanation:

href="     # Match href="
(          # Capture...
 (?:       # the following group:
  (?!      # Look ahead to check that the next part of the string isn't...
   \b      # the entire word
   exclude # exclude
   \b      # (\b are word boundary anchors)
  )        # End of lookahead
  [^"]     # If successful, match any character except for a quote
 )*        # Repeat as often as possible
)          # End of capturing group 1
[^#]"      # Match a non-# character and the closing quote.

To allow multiple "forbidden words":

href="((?:(?!\b(?:exclude|this|too)\b)[^"])*)[^#]"